Software Rasterizer with and without KMS

[aaaantoine]

Hello everyone.

My drivers have fallen back to software rendering, with or without Kernel Modesetting enabled. As reported by glxinfo:

OpenGL vendor string: Mesa Project
OpenGL renderer string: Software Rasterizer
OpenGL version string: 2.1 Mesa 7.6

I've tried running with and without xorg.conf. Below are my current software versions (Arch Linux packaging):

kernel26 2.6.31.6-1
mesa 7.6-2
ati-dri 7.6-2
libgl 7.6-2
xf86-video-ati 6.12.99.git20091014-1

And my video card is:

01:05.0 VGA compatible controller: ATI Technologies Inc RS482 [Radeon Xpress 200M]

Please let me know what other information would be necessary to further debug this issue. Thank you.

[agd5f]

Pastebin your dmesg and xorg log. You might also try:
LIBGL_DEBUG=verbose glxinfo
and see if that shows any lib-related problems.

[aaaantoine]

dmesg.log: (deleted, irrelevant)
Xorg.0.log: (deleted, irrelevant)

I don't know why the Xorg log says anything about prerelease. I got the package from Arch's standard repos, not testing or unstable.

Both logs are with KMS enabled, and with no xorg.conf.

Also, running LIBGL_DEBUG=verbose glxinfo I got this juicy bit:

libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/tls/r300_dri.so
libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/r300_dri.so    
libGL error: failed to open drm device: Permission denied          
libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib/xorg/modules/dri/swrast_dri.so

[agd5f]

Make sure your user is in the video group (or whatever group your distro uses for 3D) so you have permission to use 3D.

[aaaantoine]

Ah... Yes, that did the trick. Thank you.

Not sure why this problem hadn't manifested earlier (or maybe it has).

[bridgman]

I had the same problem show up when I went from Ubuntu 9.04 to 9.10.

[aaaantoine]

I'm getting the software rasterizer again.

- I found in my xorg.log that fbdev isn't loading because it "does not exist". I don't know if this is important.

I also get

Error	RADEON(0): [dri] RADEONDRIGetVersion failed because of a version mismatch.

...immediately followed by...

Information	[dri] radeon kernel module version is 2.0.0 but version 1.17.0 or newer is needed.
Information	[dri] Disabling DRI.

Software versions have been updated since the original post. They are now...

kernel26 2.6.31.6-1 (same as before)
mesa 7.7-1
ati-dri 7.7-1
libgl 7.7-1
xf86-video-ati 6.12.4-3

[agd5f]

Your xf86-video-ati is not built with kms support, but kms is enabled in the drm. xf86-video-ati 6.12.x does not support kms; you need git master. Boot with radeon.modeset=0 on the kernel command line to disable kms.